RTEMS 4.9.3 On-Line Library

C/C++ Sample Applications

Getting Started with RTEMS

6.3: C/C++ Sample Applications

The C/C++ sample application set includes a number of simple applications. Some demonstrate some basic functionality in RTEMS such as writing a file, closing it, and reading it back while others can serve as starting points for RTEMS applications or libraries. Start by unarchiving them so you can peruse them. Use a command similar to the following to unarchive the sample applications:

cd tools
tar xjf ../archive/examples-VERSION.tgz

The sample applications most likely to be of interest to you are:

hello_world_c - C Hello World application with a simple RTEMS configuration and an entry point not called main().
simple_main - Very simple program starting at main() and shutting down RTEMS via exit() without any other operations. It uses the default configuration inside RTEMS which is only intended to satisfy autoconf probes and extremely simple console-based applications.
libcpp - Simple C++ library for RTEMS showing how to build an application library written in C++.
psx_sched_report - POSIX Scheduler Reporter is a program that prints out some scheduler attributes of the RTEMS POSIX API.

Each tests is found in a separate subdirectory and built using the same command sequence. The hello_world_c sample will be used as an example.

Build the C Hello World Application

Use the following command to start the build of the sample hello world application:

cd hello_world_c
make

If the sample application has successfully been built, then the application executable is placed in the following directory:

hello_world_c/o-optimize/<filename>.exe

The other C/C++ sample applications are built using a similar procedure.

Getting Started with RTEMS